Astronomicheskoi kartinke dnya 18 let
16.06.2013 | Astronomicheskaya kartinka dnya

Vpervye zametka ot Astronomicheskoi kartinki dnya poyavilas' v seti rovno 18 let nazad, 16 iyunya 1995 goda. I hotya v tot den' nashu stranicu posmotreli lish' 14 chelovek, my s gordost'yu soobshaem, chto Astronomicheskaya kartinka dnya opublikovala bolee milliarda zametok o kosmose za 18 let.

Polosy ot suhogo l'da na Marse
17.06.2013 | Astronomicheskaya kartinka dnya

Pochemu na Marse poyavilis' takie dlinnye i pochti pryamye zhelobki? Oni obrazuyutsya na sklonah nekotoryh peschanyh dyun vo vremya marsianskoi vesny, ih nazyvayut "lineinymi ovragami". Kanavki imeyut pochti postoyannuyu shirinu, ih dlina dostigaet dvuh kilometrov, po ih krayam nahodyatsya valy, podnimayushiesya vyshe okruzhayushego peska.